ПОМОГИТЕ!)ЗАРАНИЕ СПАСИБО!)

1)x^2+xy/x : xy+y^2/y
2)a^2b-4b^3/3ab^2 * a^2b/a^2-2ab
3)x^2-xy/x^2+xy * x^2y+xy^2/xy
4)c+d/c-d : c^2+cd/2c^2-2d^2

^--Степень
/--Дробная черта

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